GM Parts Club
The Hummer EV 1st Gen ran from 2022-2024 and is Ultium, CrabWalk, and a lot of mass. After enough of these come across the parts counter you start to see the same short list of components over and over. Here is what owners of this generation actually end up buying, and what to know before you order.
Cooling System
The usual tell is a temperature gauge that climbs in traffic and drops back on the highway. Catch it early and it is a parts bill. Ignore it and it becomes a parts and labor bill.
Common parts in this group: radiators, water pumps, thermostats, coolant hoses, cooling fans.
Worth knowing: Aftermarket radiators frequently use fewer rows or thinner tanks than the original, which shows up as a heat problem only when you tow.
Filters and Fluids
The usual tell is an oil life monitor that reaches zero faster than it used to. This is one of the items where a towing or work truck and a commuter diverge sharply.
Common parts in this group: oil filters, air filters, cabin air filters, fuel filters, transmission filters.
Worth knowing: Air filter media density affects the mass airflow reading, which is a fueling input.
Exhaust and Emissions
The usual tell is an exhaust tick on cold start that quiets as the manifold expands. The number in the manual assumes conditions most people in North Texas do not have.
Common parts in this group: catalytic converters, oxygen sensors, DEF injectors, diesel particulate filters, EVAP purge valves.
Worth knowing: Diesel aftertreatment parts are tightly integrated with the calibration.
Body and Exterior
The usual tell is a door handle that pulls with no resistance. Mileage is a rough guide here. Load, heat and road surface matter more.
Common parts in this group: mirrors, door handles, grilles, bumper covers, headlamps.
Worth knowing: Mirrors carry cameras, heaters, turn signals, blind zone modules and puddle lamps, and the wiring connector varies by content level.
Electrical and Charging
The usual tell is the auto stop-start feature quietly deactivating itself. Worth checking at the same time you rotate tires, since the wheel is already off.
Common parts in this group: batteries, battery cables, alternators, starters, body control modules.
Worth knowing: Many recent GM vehicles need the new battery registered to the module or the charging system will keep undercharging it.
Heating and Air Conditioning
The usual tell is a musty smell for the first thirty seconds after startup. The number in the manual assumes conditions most people in North Texas do not have.
Common parts in this group: cabin air filters, blower motors, blower motor resistors, A/C compressors, condensers.
Worth knowing: R-1234yf systems on newer GM vehicles use different oils and fittings than older R-134a systems.
Before You Order
- Have the VIN ready. On a Hummer EV the same model year can carry two or three different engines and several suspension packages.
- Check the SPID label in the glove box or console for your RPO codes.
- Front and rear parts are rarely the same number, even when they look identical.
- If the part is electrical, confirm the fit before you order. Electrical parts are not returnable at any GM dealer, including us.
We have been selling GM parts online since 2009 and out of the Dallas store since 1956. Start with our GMC OEM parts catalog, or search for Hummer EV parts.
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